Can the head gaskets be used again?

This is a 400 block , 4.435 bore (.095" over) , heads are O ringed (B1s), CR around 13:1 , is it a simple matter of cleaning the old silicone off & applying some around water ways? , is it necessary to anneal the gaskets?

TIA.

Last edited by 602heavy; 03/07/09 08:19 PM.